WASHINGTON, Aug 9 (Reuters) - The US State Department has approved US$89 million worth of assistance to help Ukraine equip and train 100 teams to clear landmines and unexploded ordnance for a year, an official said on Tuesday (Aug 9).

The funding is the largest US demining program yet in Ukraine, and the official compared Ukraine's challenge to attempts to disarm unexploded ordnance in Vietnam, Cambodia and Laos following the American war of the 1960s and 70s in Southeast Asia.

"If you look at some conflicts in the not-so-distant past, the Vietnam War for example, we're still clearing ordnance in Southeast Asia 50 years after that war ended. This may be on par with that," the official said.

The programme would be run through contractors and non-governmental organisations, the official said. He said the money, part of which comes from Ukraine-linked budget requests, will not only fund training but specialised mine detection and earth moving equipment if need be.

A Ukrainian official said the aid addressed one of the country's most important tasks. "By our estimates, 160,000 sq km of Ukrainian land needs demining, which is about the size of Virginia, Maryland and Connecticut combined," said Andriy Yermak, President Volodymyr Zelenskyy's top aide.

"This aid will accelerate Ukraine's recovery," Zelenskyy's chief of staff said in a Telegram post.

The United States is the top financial supporter of conventional weapons destruction, according to a State Department report, and has provided more than US$4.2 billion in assistance to over 100 countries from 1993 through 2021.

The United States is also the world's largest weapons exporter.